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1970: John NOAKES and the Magic of BLUE SCREEN | Blue Peter | Retro Tech | BBC Archive

John Noakes demonstrates some of the mind-boggling visual effects that have been made possible using the Colour-Separation Overlay (CSO) technique. Marvel as Peter Purves loses his head and bounces John Noakes' noggin like a basketball - all while Patch the Blue Peter dog does his best to spoil the illusion. Only the BBC calls it Colour Separation Overlay, by the way - feel free to call it chroma key or blue screen / green screen like the rest of the world. Originally broadcast 28 September, 1970. Blue Peter is still going strong, with new editions of the show broadcast live on CBBC and BBC iPlayer every Friday at 5pm: https://www.bbc.co.uk/iplayer/episode... For details about how your child (or grandchild!) can earn a Blue Peter badge, visit the CBBC website: https://www.bbc.co.uk/cbbc/shows/blue... You have now entered the BBC Archive, a time machine that will transport you back to the golden age of tv to educate, entertain and enlighten you with classic tv clips from the BBC vaults. Make sure you subscribe so that you never miss a single stop on our amazing journey through the BBC Archive - https://www.youtube.com/c/BBCArchive?...